Wall Street is returning from a three-day weekend that started with diplomacy hopes, and ended with Russian President Vladimir Putin ordering troops into separatist regions of eastern Ukraine.

Investors have been responding in classic fashion — selling riskier assets and hiding in the havens. After hours of volatile futures trading, stocks are lower in early U.S. trading.

Some sage advice comes from Pepperstone’s head of research, Chris Weston, who reminds us that “trading in a headline-driven market is not for everyone, it requires a dedication to being in front of the screens, an understanding of what is noise and what is signal and an ability to keep emotions in check.”

From the updates being fired off by Wall Street banks to worried clients, we grab our call of the day from JPMorgan strategists who zero in on the front-and-center concern right now.

“Russia-Ukraine tension is a low earnings risk for U.S. corporates, but an energy price shock amid an aggressive central bank pivot focused on inflation could further dampen investor sentiment and growth outlook,” said strategists led by Dubravko Lakos-Bujas, in an early Tuesday note.